@article{ref1,
title="Football and fillings, cleats. Clinics and caries, preventive dentistry and prevent defense",
journal="Dental student",
year="1972",
author="",
volume="51",
number="3",
pages="54-55",
abstract="<p>[Abstract unavailable]  Keywords: American football; </p> <p>Language: en</p>",
language="en",
issn="0011-877X",
doi="",
url="http://dx.doi.org/"
}